http://www.gtagaming.com/forums/showthread.php?t=133688
If you have some request just post it there and not on the comment box

PS. For the people who are gonna * about the foregrip issue, nothing can be done about that since we can't edit animations.
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Niko skin used in the screenshot
http://www.gta4-mods.com/player/maximus-bellic-v2-f16692